CZ109296A3 - Apparatus of a press for feeding connecting elements and their fastening in workpieces by pressing - Google Patents

Abstract

The invention relates to a device for use in a press (8) to feed connecting components, preferably nuts, and secure them in workpieces (1) by pressing. The device has a pressing head (5) on a press component for inserting and pressing the connecting components, a rigid feed (24) to feed the securing components to the pressing head (5) and a device via which the connecting components are fed to the rigid feed or a loading position. The special feature is that the device consists of at least two components (19', 19'') which can be secured to two relatively movable press components and of which one comprises the pressing head and the other the loading position.

Description

Press Ζ3, for connecting connecting elements and their fastening in workpieces by pressing

The invention relates to a device according to the preamble of claim 1.

52S2Xad_stay_technics

It is known to produce workpieces of sheet metal withdrawn from a roll or of individual sheets or sheets using a press and a tool, for example also a successive tool arranged in such a press, by punching, permanent deformation and the like. It is also known to provide the workpieces with fastening elements during production in the press by introducing or inserting the corresponding fastening element into a pre-prepared hole and subsequently pressing the fastening element in the workpiece.

The connecting elements are, for example, pin-like elements such as screws, pins, nuts and the like.

The known device for supplying and fastening fasteners in workpieces consists essentially of a press head which is provided on one of two opposing tool or press parts and, by means of an indentation, introduces the fastener into the prepared hole of the workpiece and interacts with the other Pressing parts of the connecting element in the workpiece. The known device furthermore has a rigid, also on the tool part or press part, a lead in which the connecting elements are fed via a flexible lead, for example a hose, from the sorting and feeding device, whereby the connecting elements are further guided to the press head.

In the sense of the invention, a press is in principle understood to mean a machine having at least two tool or press parts which are movable relative to one another or interacting with each other. Preferably, such a press is a tool press of the type mentioned above for producing sheet metal workpieces etc.

The opposing tool or press parts are in this context press parts or press parts. In this press, the press tools provided which act directly or indirectly on the workpiece to be manufactured or on the sheet used for this purpose. Such tooling or pressing parts are, for example, provided with lower holders which move upwards and downwards in accordance with the pressing stroke and, on the other hand, counter-tools cooperating with them, but also these counter-tools carrying the press elements, for example a clamping plate on the press table or the intermediate plate for the opposite tool, etc.,

Depending on the design of the tool, it is often necessary to provide the pressing head on the movable tooling or pressing part of the opposing tooling or pressing part, for example on the lower holder for feeding the connecting elements from above. A disadvantage here is that, on the one hand, the entire device with the lower bracket must be moved up and down, and on the other hand, the flexible lead to the press stroke must be permanently moved up and down and thus is subject to high wear. In addition, additional acceleration forces are generated which act on the connecting elements in the flexible lead. A further disadvantage is also that the flexible supply and / or additional connecting and supply lines and lines, such as pneumatic or hydraulic lines, electric control lines, etc. limit the free lateral access to the press, for example during assembly and disassembly work or during repairs and repairs. / or maintenance. * ·

You find your strength

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device which overcomes the disadvantages of the prior art and which, without restricting free access to the press, enables ¹ trouble-free and positionally accurate feeding of fasteners fixed in workpieces to the press head.

This object is achieved by a device according to the invention according to the characterizing part of claim 1.

A particular feature of the device according to the invention is that it is formed in at least two parts, that is to say, it consists of two assemblies, of which the first assembly is mounted on the first tool part or press part two during the ram lift of the press the tool parts or press parts and the second structural unit is mounted on the second, opposing tool part or press parts. Preferably, the second part of the press or the tool part is formed as a movable tool part. The device according to the invention enables an optimum adjustment and assembly in the press, in particular a simple and quick retrofitting of the whole device is possible.

and

As well as a simple and quick replacement of the individual structural units, in particular also of the second structural unit having a pressing head. The assembly units can always be assembled and disassembled as, complete units, that is no need to remove parts of the tool, etc.

i i

When the first structural unit is provided on the stationary tool or press part and the second structural unit on the movable press or tool part, it is also prevented from forming a flexible lead for the connecting elements that would move up and down simultaneously with the movement of the press.

A further advantage of the device according to the invention is that the displacement force by which the coupling elements in the second conveying path of the second structural unit are biased for movement on the press head is given only by the first displacement device.

The control of all the functional elements, in particular also the movement of the first sliding element between its effective position and its ineffective position, as well as the control of the uniting devices provided in the uniting head, is preferably carried out according to the invention. by the co-operation of the structural units, so that there is no need to form separate control and / or supply lines and pipes leading to the second structural unit.

»* '

The device is preferably designed in such a way that the connecting elements move in succession and individually, that is in accordance with an immediate need, by means of an external supply to the loading position, and this is preferably fired.

vání. Thus, the connection of the connecting elements from the uniting and supplying device is not effected by dynamic pressure. Tp has the additional advantage, in particular of flexible external leads, of reliably avoiding interruption of the connection of the connecting elements caused by the interlocking of these elements.

The connecting elements form a closed line in the conveyor track again, in which the connecting elements are closely connected to each other, that is to say, during normal operation, a precisely defined number of connecting elements are available at all times in the second conveyor. The displacement mechanism is pre-tensioned for movement into the press head, independently of the feeding of the coupling elements, from the unifying and feeding device to the loading position, ⁴ * i ΐ

In a handover situation in which, in the lower return position of the press stroke, the receiving head is lowered onto the loading head, the transfer of the at least one connecting element from the loading position to the second conveying path is effected by the short displacement element.

In particular, the control of the movement of the first sliding element between its functional and non-functional position, as well as the controls in the loading head of the unified and safety unit. it makes sure that. According to the invention, only the presumed number of connecting elements are transferred to the second conveying path, preferably according to the invention, only by the interaction of the structural units, thereby eliminating the need to create control and / or supply lines and pipes for the second structural unit. _F, Another preferred embodiment of the device according to the invention. subject of the dependent claims. _t

The selection is from h to h to c h

The invention is explained in more detail below with reference to the drawing.

1 and 2 show a connecting element in the form of a nut and a sheet or workpiece before inserting the nut into the hole preformed in the workpiece, or after inserting and fastening the nut into the workpiece by pressing

Ná’obr. Figures 3 and 4 show a simplified and side view of an embodiment of the device according to the invention together with a press provided with the device, the first structural unit being mounted on the lower part of the press and the second structural unit on the holding press. holding the workpiece.

FIGS. 5 and 6 show, in an enlarged partial view and side view, the structural units of the device according to the invention in the first relative position, i.e. when the press is open; and in the second relative position, i.e. when the press is closed, ir possibly in the transfer situation. - * ·

Figure 7 shows a simplified illustration and a plan view of both conveyor tracks; optionally, these conveying paths forming a T-shaped assembly of the structural units when the structural units are in a handover situation. Fig. 8 is a sectional view taken along the line I-I of the structural units in their first relative position in a simplified illustration. FIG. 9 is a cross-sectional view taken along the line II - II in FIG. 8 through the conveyor path of the second structural unit. FIG. 10 is a cross-sectional view taken along the line III - III in FIG. 8 through the structural units in the second relative position or in the handover situation.

FIG. 11 schematically illustrates the movement of the sliding element of the second structural unit, which is designed as a sliding lever, when the second structural unit is raised from the first structural unit.

Fig, 12 shows a pressing head device in --R • · «· ^z 'vertical section. Fig. 13 is a top view of the die head of Fig. 12 with the carrier removed.

Fig. 14 is a view similar to Fig. 6 in which the structural units, or their uniting or loading head, and the receiving head are in the receiving position according to another embodiment of the invention.

FIG. 5 to 14, FIG. 16 shows a further embodiment of the device according to the invention. FIG. 17 is a cross-section through a supply hose forming an outer lead. FIG. FIG. 16 is a section along the line IV - IV in FIG. 16. FIG. 19 is a section along the line V - V in FIG.

16, r

- 8-Examples_of_the invention

Shown in the figures is a workpiece 16 which is produced by sheet metal pressing and which is shown in the figures for simplicity as a flat workpiece but can also have any other desired shape. In the illustrated embodiment, the connecting element is designed as a nut 2 which is fastened by a collar 2 in a bore 3 provided by pressing in the workpiece 1 by insertion and subsequent pressing using a compression ram 4 of the pressing head 5 and pressing ring 6 in the lower tool. In this case, the production of the workpiece 1 takes place in a press 8, in a tool which is provided in a press 15, in which the nut 2 is then fastened to the workpiece 1 / u. > And by compression, as is known to the skilled person.

The press 8 consists essentially of a stand 8 of the press 8 which forms the lower part 10 of the press 8 and on which the movable ram 11 of the press 8 is guided in a vertical and vertical direction.

A clamping plate 12 is provided on the lower part 10 of the press 8, on which the lower tool part 7, the counter-opposing tool 7, is fixed by means of the intermediate plate 13,

On the lower side of the ram 11 of the press 8 is provided a clamping plate on which the upper tool part 15 is fixed in the form of a punch holding plate.

* 1 *

I * * 9 r

Furthermore, the spring-loaded press 8 the lower bracket 16, which is arranged _in row ¹ _Λ ** * Radan between the upper tool part 15 and the oppositely »> * tool 7 and which is supported in the closed die under the force of springs 17 of the lower handle LB act between the lower holder 16 and the upper tool part 15, against the workpiece 1,

3 to 10, the device 19, which is formed of two structural units, is used for the controlled feeding of the nuts 2 to the tool insertion area in which the nut 2 is inserted into the corresponding hole 3 of the workpiece 1 in the nut insertion area 18. 19 and 19 **, of which the structural unit 19 is mounted on the lower tool part or on the intermediate plate 13, and the structure 19 is mounted on the lower side of the lower holder 16 or the press holder.

The device 19 has a conveyor track 20 which is connected at one end via a flexible supply hose 21 »to a sorting and supply device 22 which is arranged

Laterally from the press 8, and by means of which the nuts 2 are fed precisely to the conveying path 20 in close succession and in a predetermined position or orientation, i.e., precisely positively positioned on the conveying path 20, 2 remain forced in their predetermined position and / or orientation. The transport direction of the conveyor track 20 is shown in FIG.

marked by an arrow, which indicates the direction of transport A. The conveyor track 20 consists essentially of only a guide rail or a T-shaped guide 27 on which a carrier 26 is provided, i.e. it does not form any active conveyor track 20. The nuts 2 are in the supply hose 21 and in the conveyor. conveyed by the dynamic pressure generated by the sorting and feeding lines. device 22, ..

At that end of the conveying path 20 which is facing away from the supply hose 21, a loading is provided. or the uniting head 23, whose structure is -

described in more detail below and which together with the conveyor track 20 form a structural unit 19 *.

The construction unit 19 consists essentially of an also horizontally arranged conveying path 24 which, at one end, passes into a press head 5 provided in the tool insertion area 18 and is connected at its other end to a transfer head 25 which during press strokes 8 cooperates in a still further described manner with the uniting head 23. The end having the transfer head 25 overlaps with the lower bracket 16, i.e. the press retainer, the co-moving assembly 19 * laterally over the lower bracket 16. Feeding nuts 2 to the nut insertion Thus, the area 18 is carried out laterally from the outside of the tool * '. . ·

Also, the conveyor track 24 is a passive conveyor track, which, like the conveyor track 20, is formed by a T-shaped guide 27 *. In FIG. 9, this conveyor track 24 forms and on the underside of the carrier 26 of the dilution ^S 27 *. of the letter T shown in section. The carrier 26 * extends substantially along the entire length of the conveyor track 24 and is connected at both ends to a transfer head 25 or a press head 5. By means of the carrier 26 the structural unit 19 is mounted on the underside of the lower bracket 16. a conveying track 20 is also provided, but in a special embodiment, with the difference that the T-shaped guide 27 is not open as a T-shaped guide 27 *, optionally provided with a groove on the lower side but on the upper side of the T-shaped guide. longitudinal direction of the guide. V ^; During operation, the conveyor tracks 20 and 24 are always provided with a plurality of nuts 2 in such a way that the nuts 2 are closely connected in the longitudinal direction L or L *, or in the transport direction A or B of the corresponding conveyor track. 20, 24, and in particular in the conveyor track 24, at each instant a precisely predetermined number of nuts 2 are provided.

By means of the displacement head 25 of the displacement element, which in the illustrated embodiment is formed by a displacement lever 28, they are in the conveyor; The nut 2 is biased by a feed force for movement from the transfer head 25 in the direction of the pressing head 5 _t, i.e. in the conveying direction B of FIG. 3, in such a way that one nut 2 is always in the pressing head 5 The channel 49 formed therein, as can be seen from FIG. 12, is ready for introduction into the workpiece.

The basic operation of the device 19 is described below.

_ 'a

If the press 8 is moved to the lower return position, it takes place when the press head 5 has been pressed by the springs 17 of the lower holder 16 against the workpiece X, then inserted in the press head 5 of the prepared nut 2 into the workpiece bore 3. and, at a further downward stroke of the press 8, fastening the nut 2 V _{(of the} workpiece X in the manner described by pressing,

In the lower return position of the stroke of the yew 8, the uniting head 23 and the transfer head 25 also engage in each other so that in this closed state of the press 8 the corresponding transfer situation, i.e. in the second relative position of the structural unit 19 * and 19 **, the conveyor track 20 passes at its end formed on the uniting head 23 to the end

12 of the conveyor track 24 formed on the transfer head 25 so that the conveyor track 20 continues on the conveyor track 24. In the illustrated embodiment, the conveyor tracks 20 and 24 are provided in the lower return position of the press 8 axially coincident in a common horizontal axis.

The uniting head 23 adheres to a locking device 2.9 which is essentially formed by two stops 30 and 31, as can be seen in particular from FIGS. 7, 8 and 10, whose operation will be described in more detail below.

The unit 29 is designed so that during the press stroke from the lower return position towards the upper return position, i.e. in the direction of the transfer phase of this movement, the compression ram 4 is moved back to the initial workpiece after firmly pressing the nut 2 into the workpiece 1. position, and the press head 5 can be fitted with a new nut 2, but the press head 5, due to the springs 17 of the lower holder 16, further abuts against the workpiece X or through it against the lower counter tool 7,

the units 19 and 19 are further in the transfer situation and the first nut 2 which is on the uniting head 23 in the conveyor track 20 is fed to the transfer head 25 into the conveyor track 24 by means of the dynamic pressure generated by the sorting and feeding device 22. 28 for this purpose, during this loading or transfer phase, it is pivoted from the movement area of the nuts 2 to the conveyor tracks 20 and 24, which allows the conveyed nut 2 to be conveyed under the feed lever 28 from the conveyor track 20 to the conveyor track.

As soon as the transfer head 25, which follows the movement of the lower holder 16 or the retainer, is lifted away from the uniting head 23, the uniting device 29, eventually stops 30, closes the conveying path 20 at its end formed in the region of the uniting head 23a. the rocker arm 28 swings to its active or operative position, in which the rocker arm 28 abuts against the last nut 2 provided in the conveyor track 24 and thus biases all the nuts 2 in the conveyor track 24 for movement in the conveying direction B, shown arrow sign.

í »

The next press stroke is. in the lower return position, again the nut 2, which is inserted into the workpiece 1 in the press head 5 and fixed there, whereupon during the renewed transfer phase further nuts 2 are fed from the uniting head 23 or from the taip modified loading position. 20 to the transfer head 25, or to the end of the conveyor track 24, etc.

All movements of the functional elements in the uniting head 23 and in the transfer head 25, in particular the movement of the stop 30. and the displacement of the feed lever 28 into the non-operative position and then again into the operative position is forced by the relative movement or movement stroke between the transfer head 25 and the uniting head 23, i.e. by the control flat on the transfer head: 25 acts on the corresponding actuating surfaces on the uniting head 23 at the bottom dead center of the press stroke and during the transfer phase. In addition, during the lower dead center of the press stroke, during the transfer phase as well as in the downstream sub-area of the press stroke from the lower dead center to the upper dead center, the functional elements, i.e. the stops 31 formed therein, head, possibly in a conveyor 24 provided there.

The device 19 not only provides a reliable supply of the nuts to the tool insertion area 18, but also provides the advantage that it is not necessary to provide guide and piping guides for the lower bracket 16 as a control line. · The supply line of the hose for the supply of nuts 2 and the like, as well as the active control and control elements on the structural unit 19. Especially when the press 8 is at the top dead center, the area between the lower holder 16 or the retainer and the lower opposite tool 7 is freely accessible. By actuating the functional elements of the uniting head 23 and the transfer head 25 by means of relative movement between these heads, it is also further possible by simple means to ensure that these functional elements operate synchronously with the stroke of the press 8. , /,.

; . . . ·. '\:

In the following, the uniting head 23, the transfer head 25, the press head 5 and the modified device 19a will be described in more detail.

5 to 11, the uniting head 23 and the transfer head 25 are shown in detail.

The uniting head 23 has a housing 32. arranged * ^{L - 1} s in the end of the transport path 20 below the transport path 20, that is below the carrier 26 and cable 27 under the corresponding T-shaped, which make up a conveying path 20. In skříni.32 are in the axial direction perpendicular to the longitudinal direction of the conveying path 20, and in the stroke direction of the press 8, the two stops 30 are displaceably displaced by a predetermined value in the direction of the double arrow. C·,. against the action of the compression spring 33 from the operative position, in which each stop 30 extends from below, into the conveying path 20, into. a non-functional position in which each stop 30 is arranged outside the conveyor track 20 below the plane of the underside 20 of the conveyor track 20. In the illustrated embodiment, the stops 30 are part of a single slide 30.

Furthermore, in the housing 32 the two stops 31 are displaceable against the action of the compression spring 34 in the vertical axial direction, so that these stops 31 in the functional position extend beyond the plane of the underside 20 of the conveying path 20 and can move therefrom. downwards. The stops 31 are also part of a single slide 31

As can be seen in particular from FIG. 7, the stops 30 and also both stops 31 are offset perpendicularly in the horizontal axial direction with respect to the longitudinally disposed conveying path 20 and are arranged symmetrically to the axis in the longitudinal direction L, in the direction A For the conveyance of the conveyor track 20, both stops 31 are provided behind both stops 30.

Stops 30 and 31 are further designed and are in the direction of the axis L in the longitudinal direction arranged in such mutual distance that when the two stops 31 engages the nut 2, which in FIG. 7 labeled as Nut- 2a, ^so! in their functional position, the stops 30 always engage one wedge between the metric 2a and between the immediately following and in the conveying direction A the nut 2b against the nut 2a and thus can, as will be described later, lift the transfer head 25 away from the head unit 23 while maintaining the nut 2b and the successive nuts arranged thereon against the dynamic pressure of the sorting and feeding device 22 in the conveying path 20, through the transfer head 25 guided by the nut 2a. '* t

Above the conveyor line 24 or over the line * 27 / ve

16, a block 35 is provided which has an upwardly protruding protrusion 36, which on its upper side forms a control surface 37 for the displacement lever 28. The protrusion 36 is arranged in front of the stops with respect to the transport direction A

30.

The transfer head 25 consists of a housing 38, which is fixed on the upper side of the conveyor track 24 or on the upper side of the carrier 26 provided there and, inter alia, forms abutment surfaces 39 with its underside. When the transfer head 25 is lowered laterally from the conveyor track 20, i.e. outside the space of movement of the nuts 6 in the conveyor track 20, against the upper side of each stop 30, the transfer head 25 is lowered and pushed against the action of the compression spring 33. to the down position. When the transfer head 25 is lowered onto the uniting head 23, it is ro. the wound E1 of the underside of the conveyor track 20 in a common horizontal plane with the plane E2 of the underside of the conveyor track 24. The beginning of the conveyor track 24 in the transfer head 25 is formed by a recess 40 which is open towards the underside of the receiving head. that always sideways. protrude inwardly through the leg section 41 over the lower edge of the recess 40, and together with the recess 40, form a dráž-shaped or T-shaped guide groove, which then passes into the T-shaped guide 27,

The recesses 42 are provided in the angles 41 or in the arm sections 41, one recess 42 for each stop 31, so that when the transfer head 25 is lowered onto the uniting head 23, each stop 31 extends through the recess 42 into the conveyor track 24 or into the initial region of the conveyor track 24 on the transfer head 25. The recesses 42 are in the direction of the longitudinal direction L of the conveyor track 21.

17 are offset from the beginning of this conveyor 24 in the conveying direction B such that the nut, i.e. the nut 2a according to FIG. 7, is introduced in the conveying direction B before the recesses 42 and when the transfer head 25 is lowered 3, the receiving region 24 of the conveyor track 24 and abuts the stops 31 which extend upwardly through the recess 42, whereby it is almost completely taken over by the conveying track 24 or its receiving area 24 *.

In the housing 38, the displacement rocker 28 is also mounted by means of the pivot pin 43, pivotable about a horizontal axis that is perpendicular to the axis in the longitudinal direction L *. The hinge pin 43 or its axis is arranged above the conveying track 24 in the illustrated embodiment in the vertical direction approximately above the recesses 42,

The displacement lever 28 is designed as a two-arm lever with respect to the articulated pin 43 'and the articulated axis formed by the articulated pin.

I *. *

At one end, the feed lever 28 forms a tooth 44 which is the bearing surface for the last nut 2 introduced into the conveyor track 24, the nut 2a being shown in FIG. 5 and 6 can be pivoted about the hinge pin 43 counterclockwise into the conveyor track 24 or the front end of the conveyor track 24, and pivoted. The pivot arm 28 around the pivot pin 43 in a clockwise direction from the conveying track 24 can be pivoted to the non-functional position of the pivot arm 28.

'. . - _r * ^J ť ^J i A, '«/ ·

At the other end of the displacement lever 28, a group of tension springs 45, which are held at the other end of the housing 38 by their other ends, engage such that the displacement lever 28 is biased in its operative position by means of the tension springs. of the tooth 44 in the transport direction B shown by the arrow on the nuts 2 arranged in the conveying path 24.

A projection 46 is further provided on the displacement lever 28 to which a stop 47 is attached to the housing 38. This stop 4.7 is manually displaceable by means of a handle 47 provided on the outside of the housing 38 between a functional position in which the stop 47 is in the track. the movement of the protrusion 46, and between an inoperative position in which the stop 47 is arranged outside the travel path.

J 4

By means of the spring-loaded design of the stop 47 and through the inclined surface 46 on the protrusion 46, it is further possible to achieve that in the functional position of the stop 47 the feed lever 28 is pivoted to its non-operative position against the tension springs 45 and the abutment 47 prevents it from swinging into its operative position, so that the abutment lever 28 is held by a projection 46 which abuts the abutment 47 in an intermediate position in which the thrust lever 48 is outside the conveying path 24 and when the transfer lever is the head 25 is lowered onto the uniting head 23 also outside the conveying path 20.

On one side of the rocker arm 28 is a freely rotatable crank 48 which, when the transfer head 25 moves downwards, abuts against the operating surface 37 of the projection 36, even before reaching the lower return position of the press stroke 8, of the transfer head 25 to the uniting head 23 ', the feed lever 28 is pivoted against the action of the tension springs 45 to its non-operative position that is reached when the transfer head 25 abuts against the z

The units 19 and 19 are in their second relative relative position or handover. By means of the control surface 37 and against this control surface 37 of the abutment roller 48, the position of the tooth 44 above the conveying tracks 20 and 24 is also precisely defined and the position of the uniting head 23 and the transfer head 25 is forced.

The cooperation of the head unit 23 and the transfer head 25 is essentially described below.

In normal operation, in particular when the stop 47 is not in operation, when the transfer head 25 is lowered onto and abuts the drive head 23, the displacement lever 28 by means of a pulley 48; At the same time, the bearing surfaces 39 are moved to the inoperative position by the bearing surfaces 39, so that when the push ram 4 is returned to its initial position, a space for the other nut 2 in the conveying path 24 in the direction of In the conveying area 24, the nut 2 is introduced into the receiving area 24 / conveyor 24 by means of the dynamic pressure of the sorting and feeding device 22, in the conveyor track 20 or in the loading position 20 formed therein. ’. ’·

.... > 'Ví ··

The matrix-2a shown in FIG. 7 then abuts against a shock 31 extending into the conveyor track 24. If the transfer head 25 is moved upwardly with the lower bracket 16, the nut 2a arranged in the receiving area 24 'also moves with the upward movement of the transfer head 25, so that the stops 30 are also brought into their operational position, so that the nuts 2b, which follows the nut 2a guided by the transfer head 25 is first held by the nut 2a in the conveying path 20 and then by the stops 30. By means of the upward movement of the transfer head 25, the feed lever 28 is gradually pivoted into its operating position. then it bears with its tooth 44 against the matting 2a in the receiving area 24 and pushes the nut 2a from the receiving area 24 / into the conveying track 24 as soon as the stops 31 have completely moved away from the conveying track 24 so that this nut 2a. it is then in the transport direction behind the recesses 42 and also does not overlap these recesses 42.

The stops 31 ensure accurate and repeatable positioning of the nuts 2 being taken over independently of the tolerance of the nuts 2 already present in the conveying path 24, which greatly simplifies the transfer and unification. when, when the transfer head 25 is lowered to the uniting head 23, it is in the take-over area 24 ^{# of the} conveyor track 24, and in particular in the area of the recesses 42 of the nut 2, *

Since the bottom of the conveyor track 24 is formed at the beginning of the conveyor track 24 by angles 41 or sections of their legs 41, a tear-off protection is also achieved by the fact that when the confluence 2 is only partially transferred on the conveyor track 24 fed to the take-over area 24 and protrudes from the conveying track 24 to the extent that the nut 2.

it remains hanging on the conveyor track 20 or other part of the head of the head 23 when the transfer head 25 is lifted, so that the conveyor track 24 is not broken but only the angles 41 are bent, which can then be easily replaced. .....

The swinging movement of the feed lever 28 is at

FIG. 11 is shown in positions a to e. It can be seen that the pivoting movement of the feed lever 28 'is controlled by the control surface 37 and in particular also by the arrangement of the pulley 48 relative to the articulated pin 43'. In the operating position, the tooth 44 is increasingly closer to the nut 2a, and by lifting the transfer head 25 the movement space is also required to move the tooth 44 above the first nut remaining in the conveying path 20, i.e. the nut 2b. according to FIG.

12 and 13 show the design of the press head 5.

* 4

The press head 5 forms, at that end of the conveying path 24 which is remote from the transfer head 25, a channel 49 which is axially aligned in the stroke direction of the press 8 and which is open at the lower side 5 of the press head 5 for dispensing ^. nut 2 and in which is the axially displaceable ram 4, between the functional position in which the lower

the front surface 4 of the push ram 4 is above the conveying path 24, and between the working surface which, for inserting and firmly pressing the nut 2 into the hole 3 of the workpiece 1, the front surface 4 abuts with a pressing pressure against the upper side in channel 49 On the underside of the press head, it is open and is formed here by a plate z

bottom side 5 of the press head 5, » ⁴

As can be seen from FIGS. 12 and 13, the pressing ram 4 is axially displaceably guided in an axial direction in a housing 50, which is fastened on the upper side of the conveyor track 24 or on the upper side of the carrier 26 fixed there, against the action. a return spring 50 that surrounds the indentation ram 4.

The punch 51 is fastened to the upper face 4 of the ram 4 in the lower return stroke position of the ram 15. . .

Always. when the push ram 4 is moved back from the working position to the starting position, a new nut 2 is moved to the pressing channel 49 by the transport action of the feed lever 28, which pivots the latch 52 against the spring. The latch 52 cooperates with a sensor or proximity switch 53, which is affected by latch 52 when nut 2 is in the press channels 49. If the sensor or proximity switch 53 is not actuated in the upper return position of the press, means that the signal confirming the presence of the nut 2 is missing, so that the control device 54 of the press 8 is actuated by means of an error indicator or an error signal by disconnecting it .....

* 7 ^sec. | *

-.Plunžrové solutions deflection ram .4, .to means ^»- * control indentor ram 4 via additional / lisovníku- 51 has inter alia the advantage that it creates a short overall length and the small movement required for the press-stroke ram 4 ,. ,,.

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It goes without saying that it is also possible to modify the compression head 5, in particular depending on the connecting elements to be processed.

Next, another embodiment of the device is described

19a.

FIG. 14 shows a similar arrangement of the uniting head 23a and the transfer head 25a of a device 19a similar to that of FIG. 6, and like the device zz consists of two structural units 19a and 19a from which the structural unit 19a is fixed again on the lower part 10 of the press 8 or on the intermediate plate zz

13, and a construction unit 19a having a transfer head 25a on the lower bracket 16.

»»

The device 19a differs from the device 19 essentially in that, instead of the manually operated stop 47 in the housing 38 of the transfer head 25a, a motorized stop or a slide 55 is provided, which in the embodiment shown in FIG. with the projection 46 of the feed lever 28 between the functional and non-functional positions in the axial direction of the perpendicular axis of the press stroke and is displaceable perpendicular to the axis of the hinge pin 43 and in the operative position forms a stop for the projection 46 The slide 55 is a slide beam 28 again in the previously described intermediate position, which corresponds to the inoperative position of the slide beam 28. The stop or slide 55, when the transfer head 25a abuts the drive head 23a, is displaced by the drive head housing 23a. modified, acting on both sides pneumatic v LCE 56 into one or another position and then remains in this position as long as the transfer head 25a again starts to unifying the head 23a and the roller 56 is not appropriately controlled. By providing the cylinder 56 in the uniting head 23a, it is also not necessary to provide the control lines required for actuating the stop or the slide 55, which are usually guided on the transfer head 25a.

For actuation by the roller 56, a stop 52 has a protrusion 55 on its underside, which has at its lower free end two inclined surfaces 58 and 59 arranged at right angles to one another, which are arranged in planes perpendicular to the plane of the drawing. 14. In the uniting head 23a, two actuating slides 60 and 61 are provided, which are guided vertically, i.e. in the direction of the press strokes, at a predetermined value, displaceable in the longitudinal direction and have sloping surfaces 62 and 63 at their upper ends. The inclined surface 62 provided with the inclined surface 58 and the inclined surface 63 provided with the inclined surface 58 with the inclined surface 58 are provided on the control slide 60. By means of the roller 56, the two actuating slides 60 and 61 are actuated in the opposite direction such that, in one position of the roller 56, the inclined surface 62 is raised relative to the inclined surface 63 and in the second position of the cylinder 56 the inclined surface 63 is raised against the inclined surface 62. When starting a transfer head 25a abuts each case ^one lifting off the inclined surface 62 or 63 against the respective slant surface 58-or 59, so that in accordance with O-. In the case of inclined surfaces 62 and 63, the stop or slide 55 is moved to the functional position, i.e. when the inclined surface 63 is raised, or to its inoperative position, i.e. when the inclined surface 62 is raised or retains its position, i.e. inclined surfaces 62 and 63.

' ^J »,, i

F * For a counter-stroke movement, the piston rod 67 has a cylinder 56 which is axially disposed in a plane in which the longitudinal axes of the control slides 60 and 61 are also provided and in which the slides 25 are slid in the axial direction perpendicular to the control axis. and 61 by a predetermined value a reciprocating movable fastening body 68, which is designed as a slide and which bears against its sliding surface 68 and has a flat surface 69 on its upper side and one inclined surface on each side. 70 or 71.

Each actuator slide 60 and 61 has, at its lower end, a flat face 72, i.e., actuator 60, and a flat face 73, i.e., actuator 61, as well as inclined surface 74, i.e., actuator 60, and inclined surface. 75, that is, the control slide 61.

¹ arrangement is further arranged so that in each position of the cylinder 56 abuts the end surface 72 »optionally 73 always nadzdviženého actuating slide 60 or 61 against the flat surface 69 and the inclined surface 75 or 74 of the running control of the ram 61 or 60 is provided opposite to the inclined surface Π or 70, respectively, assigned to the inclined surface. In FIG. 14, the actuator slide 61 is in the raised position such that the face 73 engages a flat surface 69 and the inclined surface 74 is opposed to the slope of the inclined surface 70. By means of the corresponding actuation of the cylinder 56 ', 14 is moved from the position shown in FIG. 14 to the left, thereby raising the control slide 60 via the inclined surfaces 70 and 74, and consequently its end face 72 abuts against the flat face 69, while at the same time the end face 73 gets engagement with the flat surface 69 and the actuating slide 61 is lowered by an inclined surface 75 sliding over the inclined surface 71.

* * · *

By means of the surface abutting the flat surface 69, the raised control slide 60 or 61 is always secured in this position.

in

The actuation of the cylinder 56 takes place during a period of time in which the transfer head 25a is lifted away from the uniting head 23a, depending on the signal given by the control device 54, so that in normal operation, one is inserted at each press stroke 8 the nut 2 into the workpiece 1, the control slide -61 is in the raised position and so the stop or slide 55 remains in its inoperative position. The control slide 60 is then raised only. when, for example, in accordance with a particular production program, a nut 2 is not to be inserted into a particular workpiece 1, or if a nut 2 has not been inserted into the workpiece 1 due to a failure.

The stop or slide 55 is further moved to the functional position when the nut 6 cannot be inserted into the corresponding workpiece,, for example because the belt is cut, the hole 3 is missing, the end of the belt etc.

On the conveyor track 24, a reverse blocking device 76 is provided at the beginning of the conveyor track 24, as can be seen from FIG. 7. and also in the region of its end or in the region of the channel 49, which prevent the nuts 2 from returning. In FIG. 13, the pressing head 5 is shown from the upper side with the carrier 26 removed. Both are on the squeezing channel 49 adapted flexibly and as a latch blocking parts 76 are further reverse ΐ at ^{1 T} is formed so that not only prevent back, movement in matic.2

a.prove the nut 2 in the press channel 49 against falling out of the press channel 49 in the initial position of the ram 27, but also simultaneously push the nut 2 arranged in the press channel 49 in the transport direction B against the pawl 52. or the proximity switch 53 / if the nut 2 is ^{in the} pressing channel 49 only if the feed lever 28 is not in its operative position.

*

In order to ensure trouble-free operation, the functional length of the respective portion of the conveyor track 24 which is between the stops 31 and between the shadows of the end of the conveyor track 24 on the side of the press head 5 is selected such that a predetermined number of matrices 2 having the largest outer diameter D in terms of possible tolerances, i.e. the length of this part of the conveying path 24 = ύ ^χ β _β13χ ι where n is the number of matrices 2. ·

On the upper tool part 15 there is provided a cylinder 77 for the actuating slide 7, which in the operative position allows the transfer of the pressing force in the lower return position of the press stroke from the punch 51 to the push ram 4 'by:. The plunger 78 forms a support surface for the upper end of the punch 51. Also provided by the actuator 54 of the actuated cylinder 77, the plunger 78 is displaceable into a non-operative position in which the upper end of the punch 51 does not rest against the plunger 78. so that in the lower return position of the press stroke, the press ram 4 is not actuated by the punch 51.

In the following 'device 19b is described. * ¹ 4 4 '* ¹ , - ^1, 1 i

16 to 19, like the giant 6 and 15, the loading or unifying head 23b and the transfer head 25b of the device 19b are shown, which, like the device 19, consists of two structural units, i.e. a structural unit 19b, which has a loading or unifying head 23b and a structural unit 19b * having a transfer head 25b.

i *

The structural unit 19b is again fastened to the lower part 10 of the press 8 or the intermediate plate 13 therein, and the structural unit 19b is fastened to the lower bracket 16. ;

The device 19a differs from the device 19 essentially only in that the loading head 23b is provided instead of the unifying cam 23a for the operation in which it is operated. the nut 2, which is provided at the end of the conveying path 20 or its loading position 20 * in the lower punching position of the press stroke, i.e. in the transfer situation, is fed from this loading position 20 into the receiving area 24 of the conveying path 24 By means of this special embodiment of the loading head 23b, the nuts 8 from the sorting and feeding device 22 can be conveyed by means of the supply hose 21 in a time sequence and controlled in a predetermined manner by means of nailing f to the loading position 20, wherein the nuts 2 in the supply hose 21 are oriented relative to each other, a., to the conveying direction in the same way as in conveying tracks 20 and 24, i.e. they are arranged perpendicular to their directions A and B respectively. traffic and parallel to each other. In order to maintain this orientation, as in the previous embodiments of FIG. 17, the supply hose 21 has a channel 21 of rectangular cross-section adapted to the axial height and diameter of the nuts. Even in the long length of the supply hose 21, the nuts 2 are reliably conveyed without the risk of jamming or jamming the nuts 2 together. *

Furthermore, in the apparatus 19b, during normal operation, the conveyor track 24 is completely occupied by the nuts 2, that is to say, at each moment in the conveyor track 24 there is a precisely predetermined number of nuts 2 which are in each other. close position and create advice.

Furthermore, at the lower dead center of the press stroke, not only the first nut 2, which is in the conveying path 24 or in the press channel 49, is removed in the device 19b, i.e. it is fixed to the workpiece 1 but also converted. * the nut 2 from the loading position 20 to the transfer area, 'I · ·. · ♦ · *.

Feed rocker arm 80 is at its end below the level .spodním the transport path 20 via the pivot hinge pin 81 about horizontally perpendicular to the direction of transport and arranged i ^r r 'axis, i.e. about an axis which is perpendicular to this conveying direction, and simultaneously also perpendicular to the axis of the nuts 2 in the conveying path 20.

In the illustrated embodiment, the feed lever 80 is made of a flat material in substantially the same way as a flat lever and is arranged perpendicular to the axis of the hinge pin 81 with its larger surface side sides.

‘Λ · ·· '‘ V,.' '. ', ’·. . I. * '' 'i'

The length of the rocker arm 80 and the pivot angle of the rocker arm 80 are selected such that the upper end of the pivot pin 81 further extends the end or the end forming the sword section 80 and the displacement tooth 80 formed therein. in the normal and initial position of the feed lever 80, it is pivoted away from the loading position 20 and is positioned below the plane of the conveyor track 20 so that the nuts 2 above the normal position provided by the feed lever 80 can move around it to the loading position 20 '. In FIG. 16, this normal position is indicated by broken dashes. The position of the feed lever 80 that it assumes at the end of the feed stroke in which the feed lever 80 extends through the slot 82 from below into the conveyor path 20 and moves in the transport direction A along the conveyor path 20 is shown by solid lines.

The pivot of the feed lever 80 for performing the feed stroke and the return stroke, i.e. between the normal position and the maximum stroke position, and from it back to the normal position is effected by a double-acting pneumatic cylinder 83 which is controlled by the control device 54 '.

The loading or uniting head 23b further has spring-loaded stops 30 and 31, which form a locking or uniting device 29, wherein the stops 30 in their functional position precisely define the loading position 20 ', i.e., the stops 30 and 31 for the corresponding nut 2 v. to this loading position 20 and the stops 31 precisely define the receiving area 24, which means that they form abutments for the filled or supplied nuts 6 in the receiving area 24.

On the conveyor track 20, in the transport direction A, prior to the loading position 20, a backstop 84 is provided which is opposed by a pivot lever against the action of a compression spring or other resilient element about a vertical axis. In that case, the reverse blocking device 84 has a position such that it remains in the conveying path 20 between it and the functional stops provided by the stops 30. The clearance which is slightly larger than the diameter of the nut 2. By means of the backstop 84, it is also prevented from withdrawing from the punching of the nuts 2 not shot in the loading position 20 '.

ZZ ¹ In the loading position 20, a pivot latch 85, which cooperates with a sensor 36, for example a proximity sensor, is provided against the action of the compression spring, such that the sensor 86 gives a signal confirming the presence of the nut 2 only when the nut 2 is in the loading position 20, i.e. between the backstop 84 and between the stops 30 which are in the operative position,

The operation of the device 19b is essentially described below.

In terms of insertion and attachment of the nut 2 into the hole 3 of the workpiece 1, the device corresponds. 19b of the device 19. Therefore, it is possible to refer to the corresponding description ^,

In a possible embodiment of the device according to the invention, the feed lever is controlled so that it is hormone in its initial or normal position and only performs a feed stroke and a subsequent return stroke during the lower dead center of the movement of the press. In this case, before the lower dead center stroke of the stroke is reached, the actuator 54 is shot by the separating and feeding means 22 of the nut 2.

From z to loading position 20 between the empty supply hose and the empty conveyor track 20, if the sensor 86 reports the missing nut 2- If the press 8 has reached the bottom dead center, it is controlled by the sensor 87 via the actuator · 54 pneumatic cylinder 83, whose piston rod 88 is connected to the feed lever 80 by means of a pivot pin 89 and thus performs a feed stroke and a subsequent return stroke, wherein the ria in the inoperative φοίοζβ, i.e. lowered position.

20 to the receiving zone 24 by means of a feed lever 80 or its shear noise 80

Advantageously, however, the control of the balance beam 80 is effected differently from the previous one; In the normal working operation, when the press 8 is moved from the top dead center to the bottom dead center, the feed lever 80 is in an intermediate position in which the nut 2 prepared in the loading position 20 pushes the feed lever 80 against the stops 30. When the lower bracket 16 and the transfer head 25b have pushed the stops 30 into the inoperative position at the bottom dead center, the feed lever 80 moves the nut 2 from the loading position 20 to the receiving zone 24. If the press 8 has left the bottom dead center and no nut 2 is in the loading position 20, for example, the sensor-controlled displacement lever 80 is pivoted to its initial position and not fired into the loading position.

Z z from position 20 added new nut 2.

Irrespective of the described control of the feed lever 80, the feed lever 28 of the transfer head 25b is always in the non-operative position in the lower stroke position of the press 8 and pivots to the functional position when the press 8 is moved upwards. the gripping nut 2, which is pushed by the transfer head 25b, is pushed by the feed lever 28 into the conveying track 24 and there forms the last nut 2,

If the nut 2 has not been removed in the previous working cycle of the press 8 in the press head 5, the transferred nut 2 remains in the receiving area 24 in this receiving area 24, which is then at the next dead center of the press 8 or the uniting head 23b is already fitted with a nut 2, which is, for example, reported to the actuator 54 by a sensor provided on the transfer head 25b, so that the actuator 54 in this case does not actuate the pneumatic cylinder 83 to move the rocker arm 80. actuation also such that in the lower dead center of the press 8, the pneumatic cylinder 83 is forced to pivot the rocker 80. If the receiving area 24 is still fitted with a nut 2, the nut 2 prepared in the loading position 20 is pressed against it. will remain when restored subsequently 8 m press movement upwards in the loading position 20

The pneumatic pressure is set by the pressure control valve r and preset to a value so that no destruction occurs even when the takeover zone 24 is occupied *

The transfer head 25b corresponds, in terms of its configuration and function, to the transfer head 25,

The invention has been described above with reference to exemplary embodiments. It goes without saying that numerous changes and modifications are possible without departing from the spirit of the invention underlying the invention.

Thus, for example, it is also possible to form the stops 30 and / or 31 as separate slides.

Claims (31)

F Α Γ Ε’Ν V 0 V É (θ 'σι Claims ο ΙιΉ Ο «j οι nt Pressing device for supplying fasteners and their fastening in workpieces by compression, having on the tool part or press part of the press a press head, which is used to insert and press fasteners in workpieces, having fixed feed lines fasteners to the press head in which the fasteners are closely connected in a row, having means for supplying the fasteners to the fixed feed and having means for generating a displacement force further displacing the fasteners in the fixed feed in the direction of the press head, characterized in that the device consists of at least two construction units (19, 19; 19a, 19a, 19b, 19b), of which the first construction unit (19, 19a, 19b) is mounted on the first tool part or part of the press (7), 13) two during the stroke of the berqnu press relatively relative to each other movable tool and the second structural unit (19 **, 19a *, 19b **) is mounted on the second tool part (16) that the first structural unit (19, 19a, 19b) has a loading or unifying head (23), 23a, 23b) and the second structural unit (19, 19a ', 19b) has a transfer head (25, 25a, 25b), the loading or unifying head (23, 23a, 23b) and the transfer head (25, 25a) _; , 25b) are adapted to each other such that the loading or unifying head (23, 23a, 23b) and the transfer head (25, -25a, 25b) in the transfer situation are adjacent to each other with the tool parts or press parts (7, 16) approached and complemented by the number of fasteners (2) being inserted into the workpiece (1) in this handover situation, Z z is from the loading position (20) or from the first conveyor track 36 (.20) of the first structural unit is transmitted to a second conveyor path (24) of the second structural unit, wherein at least a first displacement element (28) is provided on the transfer head (25, 25a, 25b) for generating a displacement force and 36, 37, 48) operating the first displaceable element (28) so that it is in a non-operative position in the handover situation, and when the structural units move from the handover situation to each other, it moves to the functional position. >. 1 Device according to claim 1, characterized in that the fixed guide is divided and formed by a first conveyor track (20) associated with the first structural unit and a second conveyor track (24) associated with the second structural unit. and that, with respect to the conveying direction (Λ, B) of the first supply or conveyors (20, 24), the first conveyor track (20) terminates at the loader or uniting head (23, 23a, 23b) and the second conveyor track (24) starts at the transfer head (25, 25a, 25b). Device according to claim 1 or 2, characterized in that at least one energy storage device, preferably at least one spring (45) formed by a spring (45) is provided on the transfer head (25, 25a, 25bf). accumulator for generating displacement force, * * · '· * «· Device according to one of Claims 1 to 3, characterized in that at least one actuating surface (37) is provided on the loading or unifying head (23, 23a, 23b) against which it rests before reaching the transfer head. situation of the opposing surface (48) on the first displacement element (28) or on the accumulator, of energy, by moving the first displacement element (28) against the action of the energy accumulator from the effective energy storage means via the control surface (37) and the opposing surface (48) to an ineffective position. Device according to one of Claims 1 to 4, characterized in that a closing element is provided on the transfer head (25, 25a, 25b), which is formed, for example, by a stop (47, 55) or a slide which it is movable between an effective and an ineffective position and in its effective position blocks the first displacement element (28) in its inoperative position against the action of the energy storage device. Device according to one of Claims 1 to 5, characterized by. characterized in that the first displacement element (28) has a section, for example a tooth (44), by means of which the first displacement element (28) in its effective position extends into the second conveying path (24) to abut against the conveying path (24) arranged connecting element (2), and that the section, for example the tooth (44), is arranged outside the second conveying path (24) in the inoperative position of the feed element (28), preferably the first feed element (28) in its ineffective position being at least its section in toothed (44) laterally or above the second conveyor track (24). 7. Device according to one of claims 1 to 6, characterized in that the stop (55, 57) or latching mechanism _T VACI element for the jack element (28) is manually and / or mechanically moveable between inoperative and operative position. j Device according to claim 7, characterized by. team *. that for actuating the stop (55), actuating surfaces (58,> 59) co-operating in the position of the structural units (19a *, 19a) in the transfer situation with at least one actuating surface (62, 63) which can be actuated by the actuator , for example a hydraulic cylinder (56) provided in the loading or unifying head (23a). Apparatus according to claim 8, characterized in that the actuating surfaces at the stop (55) are inclined flats (58, 59) to which the inclined surfaces (58, 59) corresponding to and actuated by the actuating element (56) are aligned surfaces (62, 63) on the loading or unifying head (23a),. ‘-T Device according to one of claims 1 to 9; characterized in that the first scissor element is a first displacement rocker (28) which is pivotable about an axis of the hinge pin (43) on the transfer head (25 ± 25a) and acts on the energy storage device (45). Device according to claim 10, characterized in that the axis of the hinge pin (43) is arranged perpendicular or transversely to the plane in which the transport direction (B) of the second conveyor track (24) is in the region of the transfer the heads (25, 25a) and the stroke axis direction of the press. * q ... Apparatus according to one of claims 1 to 11. . you, 's signifying' s ^{! e} t in that lisovací.hlavě ha (5) is adapted Venom sensor device (.52, 53) issuing an alarm signal if not in the set position of the press stroke, for example in the upper return stroke position of the press, the die ( 5) no connecting element (2). Apparatus according to one of Claims 1 to 12, characterized in that on the second conveyor track (24) there are reverse blocking devices (76) for the connecting elements (2). Apparatus according to one of Claims 1 to 13, characterized in that a projection or pulley co-operating with the operating surface (37) is provided on the first displacement vehicle (28) radially offset from the axis of the hinge pin (43). . -1 ' Device according to one of Claims 1 to 14, characterized in that, in the handover situation of the structural units (19 *, 19 *, 19a ', 19a, 19b', 19b), the first conveyor (20) passes into the second conveyor line * (24). in -i '' ' Device according to one of Claims 1 to 15, characterized in that the loading or unifying head (23, 23a, 23b) has at the end of the first conveying path (20) or at the loading position (20), insurance or poison * a notification device (29) which is operated immediately or after reaching the transfer situation by preferably approaching heads (23, 23a; 23b; 25, 25a, 25b) and allows the transfer of the exclusively necessary number of connecting elements (2) from the first conveying path (20) to the second conveyor track (24). Apparatus according to claim 15, characterized in that at least the first stop (30) extending at the end of the first conveyor track (20) or at the loading position (20) has at least the first stop (30) at the end of the first conveyor track (20). distance construction units (19 *, 19, 19a, 19a, 19b, 19b) to the first conveyor track (20) and retains the connecting element (2) arranged in the loading half of (20) and that the first stop (30) is moved from the first conveyor (20). Device according to claim 17, characterized in that the first stop ^! (30) is movable or movable in the direction of the stroke axis of the press ram. Device according to one of Claims 1 to 18, characterized in that at least a second stop (31) is provided on the loading or uniting head (23, 23a, 23b), which in the transfer situation extends into the second conveying path (24). that in the second conveying path (24) in the conveying direction (B) before the second stop (31) a sub-region is formed in which only a predetermined number of connecting elements (2), for example only one connecting ⁴ element (2) . Device according to claim 19, characterized in that at least one second stop (31) is spring-loaded. F Device according to one of Claims 1 to 20, characterized in that the second conveying path (24) is provided at its beginning formed on its transfer head (25, 25a, 25b). tear-off lock (41, 4ΐ), Device according to one of Claims 1 to 21, characterized in that an upper tool part (15) which can be operated between the compression head (5) of the press head (5) and the compression head (4) of the press head (5) ) an arranged slide (78) which is by means of an actuator, for example an actuating roller (77), 41, movable from an effective position in which the ram is lifted by the compressed ram during the ram ram stroke in the lower return position to an ineffective position in which the ram ram is not actuated during the ram ram stroke. Device according to one of the preceding claims, characterized in that the second displacement element provided on the loading head (23b) is a second displacement lever (80) which is pivotable about an axis of the hinge pin (81) on the loading head (23b). Device according to claim 23, characterized in that the axis of the hinge pin (81) is perpendicular or transverse to the plane in which the direction is. (A) conveying first to &quot; Z &quot; - in the legal path (20) in the loading position (20) and the direction of the stroke axis of the ram press. Device according to one of Claims 1 to 24, characterized in that the sorting and feeding device (22) for supplying the connecting elements (2) to the fixed supply is such that the connecting elements (2) are transported individually, if necessary. via an external lead (21) to the loading position (20) of the loading head (23b), and that at least one second displacement element (80) is provided on the loading head (23b) to introduce the connecting element (2) in the transfer situation this in a loading position (20) formed at the end of the first conveyor track (20) into the second conveyor track (24). 26. The apparatus of claim 25, wherein:. wherein the second displacement element (80) has a bearing surface or displacement tooth (80) and is from a starting position in which -42, the second displacement element (80) or its displacement tooth (80 **) is arranged outside the first conveying path (20) movable for the displacement stroke and the subsequent return stroke such that the second displacement element (80) extends through the displacement surface or displacement with a tooth (80) at least during the feed stroke to the first conveying path (20) and there moving in the conveying direction (A). , _; Device according to claim 25 or 26, characterized in that it is provided with an actuating element, preferably a piston cylinder, for example a pneumatic piston cylinder (83) for controlling the second displacement element (80). Apparatus according to one of Claims 1 to 27, characterized in that: characterized in that the connection of the connecting elements (2) to the loading position (20) is effected by means of an external conveying path, for example by means of a flexible supply hose (21) individually and by compressed air injection, < of 2.9. Device according to one of Claims 1 to 28, characterized in that the connecting elements are nuts (2), in that the nuts (2) are arranged in their external inlet (21) with their axes perpendicular to the transport direction (A) and parallel to each other. and that the outer inlet (21) is formed by a hose housed in a rectangular channel (21) adapted in cross section to the height and diameter of the nuts (2),. Λ. Device according to one of claims 1 to 29. characterized by. that a second sensor (86) cooperating with the control device (54) is provided at the loading position (20) so that when the latter is not in the loading position (20) - 43, a defined number of connecting elements (2) is actuated by an external supply device (22) for firing at least one connecting element (2) into the loading position (20). Device according to one of Claims 1 to 30, characterized in that the second displacement device (80) is operated by a control device (54), preferably with reference to the signals of at least one third sensor (87), and thus that the second displacement element (80) executes from the initial or normal position in the handover situation; corresponding to its ineffective position, the feed stroke and the consequent return stroke or the feed stroke from an intermediate position in which it secures the coupling element (2) in the loading position (20), followed by a return stroke to the starting position and 20) partial stroke to intermediate position. . Device according to one of Claims 1 to 31, characterized in that it is provided with at least one reverse blocking device (84) which is .. véno. in the direction of the first conveyor track (20) before the loading position (20.